Drill round hole for drainage in metal sheet, which tool?

[öringen]

Which tool is most suitable for drilling holes for 110mm drainage? It needs to go through a floor where there is a built-in old folded metal roof (the room was previously a recessed balcony). Are there hole saws that can handle metal?

 

[sir_daniel]

If it's not visible, you might be able to use a reciprocating saw with a metal blade, or a jigsaw. Then use a regular hole saw to get an even hole where it is visible.

 

[f91jsw]

CO has a cheap one that's said to handle steel:

http://www.clasohlson.com/se/Hålsåg-Cocraft/Pr408897000

I guess you just have to try it.

 

[toolman77]

All hole saws should be able to make a hole before they're worn out. I've drilled with one like this to make a hole in my stainless steel kitchen counter with 1.5mm sheet metal and it's still going

http://www.jula.se/catalog/verktyg-...alsagar-och-dosfrasar/halsagar/halsag-189127/

149:- for a 111mm drill isn't too bad.

 

[öringen]

Good. Then let's try with a hole saw. Is it good to have a slightly larger than 110mm hole when going through with the drain? I saw that Claes O had one that was 127mm?